Improvement in band sawing-machines



sweets-sheen) H.-J.'CORDESMAN,JI. BAND-SAWING MACHINE.

' No.1 77,622. Patented May 23,1876.

3 sheets -sheet 3.

n. J. CORDESMAN,J1-. BAND vSAWIN'G MACHINE.

Patented May 23,1876.

R. WASH N. PETERS, PHOTU-UTHOGRAPNE device shown in Fig. 3.

UNITED STATES HENRY J. CORDESMAN, JR, or CINCINNATI, OHIO, ASSIGNOR TO OORDESMAN,

EGAN & 00., OF SAME PLACE.

IMPROVEMENT IN BAND SAWlNG-MACHINES.

Specification forming part of Letters Patent No. 177,622, dated May 23, 1876; application filed February 19, 1876.

To all whom it may concern:

Be it known that I, HENRY J. OORDESMAN, Jr., of Cincinnati, Hamilton county, and State of Ohio, Band Sawing-Machines, of which the following is a specification;

My invention consists, in the first part, in a new and peculiar device for balancing the weight of the guide-slide of the machine; sec

ondly, in an improved manner of securing the table to the frame, so as to provide in a simpier way than heretofore for adjustment of the table to different angles, means being provided for steadying the table at the point of adjustment;-thir'd, in an improved device for securing and adjusting the guides of the sawblade; fourth, in a peculiar manner of connectin g the journal-bearing for the upper bandwheel to the sliding frame of the same, by which a simple means of adjusting or leveling the upper shaft is provided.

Figure l is a perspective view of a band sawing-machine embodying my improvements. Fig. 2 is a perspective view of the device for securing the table to the frame of the machine. Fig. 3 is a section, showing the device for balancing the saw-guides. Fig. 4. is a plan of the tive view of the guides for the saw blade. Fig. 6 is a section of Fig. 5. Fig. 7 is a perspective View of the device for securing and adjusting theshaft of the upper band-wheel. Fig. 8 is a section of Fig. 7.

A is the frameot' a band sawing-machine, havingcustomary upper and lower band-wheels B B for carrying the saw 0. The lower shalt and band-pulley receive and apply the power, andthe upper pulley merely carries the saw. D is a box forming part of the frame, and it is fitted with slideways d, in which is secured a sliding plate, E, adjustable by reason of the screw 6, which has a bearing in the bottom of the box, and a screw-connection, with a lug, on the plate E. F is the journal-box for the upper band-wheel, and b the mandrel, which revolves in the box and carries the wheel, which is secured to it by nut b. The box 1 rests over a depression, 0 of the plate E,

(shown in the completed view of plate E by dotted lines, Fig. 6,)

have invented an Improvement in Fig. 5 is a perspecand is supported upon the plate E on both sides at the points X X, and is prevented from accidental removal .or displacement by means of notches f in the lower half of the box embracing the edge of the plate E at the points X X. turns in plate E, and is tapped into the arm f, depending from the lower half of box F.-

As the strain of the saw upon wheel B will have a tendency to draw the arm f from plate IE, it is evident that the horizontal position'ot the bearing F may be varied or adjusted by operating screw 6 the bearing resting so as to rock uponthe edge of plate E in the notches f. The top extension of frame A has two small arms, G G, to whichare secured, as shown in Fig. 4, sockets g g, by means of bolts. These sockets, by means of suitablyapplied collars h, uphold the tubular slideway H of the adjustable guide post I, which secures the stem 1 of the upper saw-guide. In one of the sockets is secured a set-screw, i, which secures the post I in position, when desired. By reason of these detachable sockets g g the saw can be put in more convenient form for shipment. As seen in Fig. 3, I form the post I hollow, and secure at its base a split socket, i, in which the guide-stem I is secured, while the upper end is left open. Inside the slideway H, at its top, I introduce a button, K, and inside the post I, at its base and upon the socket i, I form another button, K. L is a section of rubber tubing, secured between and to these buttons K K, and, neoessarily, passingdown post I, in such a manner that when the guide-supporting post I is at its greatest elevation the tubing will be strained enough to counteract the weight of the post and guide, and prevent them from dropping upon the table below when the set-screw i is loosened. It is not, however, necessary that therubber. tubing L should be in the form-of a tube, as a band-like piece would perform all the functions of the tube. Secured to sockets 'g. g are the two. supporting-arms of the guard M, which protect the saw above the table and partly around the upper wheel. The lower portion of. frame A has a small neck, N, shown in Fig. 2, with concave bearing-surface n, extending upward and outward to a position under the upper saw-guide, and supports A screw, 0 I

a semi-cylindrical bearing-arm, 0, having retaining-collars 0 0 and an enlarged bearing- -plate, 0 towhich latter part the table P is secured. The bearing-arm O rests in the concave bearing a, and can be revolved within certain limits to alter the position of'table P to or from a horizontal position, accordinglyas it is desired to make a straight or bevel saw-cut. The collars or flanges o and 0 will' not only retain the table in position, but the neck N, being fitted snugly between them, will also give steadiness to the table. In the collar 0 is formed a concentric slot, 1, through which a set-screw engages with, the neck N, 7 whereby the table can be held in any desired. position, and also held firmly to its bearing.

J is the guide-plate, having a stem, I, to enter the split retaining-socketni of post I. Secured to the face of the plate J is a backplate, Q, against which,.when in operation, the back of the saw runs. R R are the adjustable side guides, and are secured against the back-plate Q by means of set-screws S passing through the plate Q and into the set my hand.

plate J. The position of plate. Q, with relation to the bracket J, may bevaI-ied'or changed by means of set-screws T T T T, acting in connection with screws S, the object being to adjust the guide perfectly to the backof the saw,- so that a bearing, the whole depth ofthe purpose specified.

3. The combination of guide-plate J, ad-

1 jnstable back-plate Q, adjustable side guides R IV, adjnstii'ig-screws T T T T, and fastening-screws S, connected and operating, substantially as and for the purpose specified.

4. The sliding plate E, having adjustingscrew 0 in combination with the adjustable notched bearing F f f, substantially as and for the purpose specified.

In testimony of which invention I hereunto HENRYJ. OORDESMAN, JR.

Witnesses EDGAR J. GRoss, J oHN' E. J ONES. 

